Really this is a good question between two popular and choices sites facebook and google+.Facebook are mostly all person loke mainly youngsters but in google+ only people made account means rough used.

Don't thing like that. i will tell you. why? facebook fan page, Google+ both are very much important. apart from that business & branding one more advantages will be there. Now Google going change the algorithm in march 1. it never affected the Google SERP. But here after Google will going to take the content from Google+ only. So give more important for Google+.